On Critical Relative Distance of DNA Codes for Additive Stem Similarity

We consider DNA codes based on the nearest-neighbor (stem) similarity model which adequately reflects the "hybridization potential" of two DNA sequences. Our aim is to present a survey of bounds on the rate of DNA codes with respect to a thermodynamically motivated similarity measure called an additive stem similarity. These results yield a method to analyze and compare known samples of the nearest neighbor "thermodynamic weights" associated to stacked pairs that occurred in DNA secondary structures.Comment: 5 or 6 pages (compiler-dependable), 0 figures, submitted to 2010 IEEE International Symposium on Information Theory (ISIT 2010), uses IEEEtran.cl

ВЛИЯНИЕ КОНЦЕНТРАЦИИ КАЛИЯ, НАТРИЯ И АММОНИЯ НА СОРБЦИЮ ЦЕЗИЯ СМЕШАННЫМ ФЕРРОЦИАНИДОМ НИКЕЛЯ-КАЛИЯ НА ОСНОВЕ ГИДРАТИРОВАННОГО ДИОКСИДА ТИТАНА

The effect of single-charged cations (Na+, K+, NH 4 +) on the cesium sorption with mixed nickel potassium ferrocyanide sorbent based on hydrated TiO2 was studied. The K + and Na+ ions exert no effect at their concentrations of up to 0.5 M; the Cs+ distribution coefficients from KCl and NaCl solutions are (1.1 ± 0.5) Ч 105 and (8 ± 3) Ч 104 mL g-1, respectively. The sorbent is highly specific to Cs+ in the presence of ammonium ions. The sorption mechanisms were studied. The concentration ranges in which Cs+ and NH 4 + are sorbed by independent mechanisms (Cs+, by the ferrocyanide phase; NH 4 +, by the phase of hydrated TiO2) and in which the Cs+ distribution coefficient decreases owing to competitive filling of the ferrocyanide phase with ammonium ions were determined. At cesium concentrations in solution exceeding 50 mg L-1, Cs+ and NH 4 + are absorbed jointly owing to coprecipitation in the mixed ferrocyanide phase in the pore space of the sorbent. © 2013 Pleiades Publishing, Ltd

ВЛИЯНИЕ ПОВЕРХНОСТНОГО МОДИФИЦИРОВАНИЯ ГИДРАТИРОВАННОГО ДИОКСИДА ТИТАНА НА СЕЛЕКТИВНОСТЬ ПО ОТНОШЕНИЮ К СТРОНЦИЮ

The effect exerted on the selectivity of hydrated TiO2 to Sr by surface modification of the sorbent involving immobilization of mixed nickel potassium ferrocyanide was studied. The Sr specificity of the resulting sorbent (denoted as T-55) is comparable with that of hydrated TiO2: logK d (K d is Sr distribution coefficient, ml g-1) is 2.7 ± 0.2 in sorption from tap water with pH 7.8 ± 0.2, 2.7 ± 0.5 in sorption from CaCl2 solutions with pH 5.6 ± 0.2, and from 2.5 ± 0.8 to 1.7 ± 0.4 in sorption from CaCl 2 solutions with pH 7.0 ± 0.2. The modification makes the resulting T-55 sorbent selective to Sr in the presence of Ca at pH 5-6. © 2013 Pleiades Publishing, Ltd

The study of sorption of caesium radionuclides by "t-55" ferrocyanide sorbent from various types of liquid radioactive wastes

The sorption of caesium by T-55 sorbent from different types of liquid radioactive wastes is studied. It is shown that the sorbent can be used for extraction of caesium from high level acidic and saline solutions and also for decontamination of caesium contaminated waters containing surfactants and EDTA. © 2012 Akadémiai Kiadó, Budapest, Hungary

BRICS influence on global capitalist economy

The paper surveys the BRICS’ performance in the world during the last fifteen years. It analyses the economic environment as well as the possibility of rising of a possible new “global power”. The paper presents the statistical data on economic growth, international trade, population and currency reserves of the BRICS countrie

Peculiarities of sorption isotherm and sorption chemisms of caesium by mixed nickel-potassium ferrocyanide based on hydrated titanium dioxide

Sorption isotherm of caesium from tap water by mixed nickel-potassium ferrocyanide based on hydrated titanium dioxide is obtained for a wide range of concentrations of caesium. It is shown that there are three types of specificity to caesium sorption sites in this sorbent. Sorption chemisms of caesium are studied, factors conditioned high sorption capacity of the sorbent are revealed. It is shown that occupation of sorption sites I and II is well approximated by Langmuir equilibrium and this process can be described within the bounds of theory of ion exchange. The expected sorption chemism of caesium by sorption sites III at high concentrations of caesium (>50 mg L-1) is precipitation of mixed nickel-caesium ferrocyanide in pore space of the sorbent. © 2013 Akadémiai Kiadó, Budapest, Hungary

Asymptotic analysis of MMPP/M/1 retrial queueing system with unreliable server

In this paper, we study a single-server retrial queueing system with arrival Markov Modulated Poisson Process and an exponential law of the service time on an unreliable server. If the server is idle, an arrival customer occupies it for the servicing. When the server is busy, a customer goes into the orbit and waits a random time distributed exponentially. It is assumed that the server is unreliable, so it may fail. The server’s repairing and working times are exponentially distributed. The method of asymptotic analysis is proposed to find the stationary distribution of the number of customers in the orbit. It is shown that the asymptotic probability distribution under the condition of a long delay has the Gaussian form with obtained parameters

Control of the enlisted potential of the higher school: problems and the prospects

In the article the problems of control of the enlisted potential of higher school in connection with the renovation of normative lawful reports in the sphere of labor, formation and science are examined. Some problems in the sphere of control of cadreresources and the regulation of the labor of pedagogical workers in the system of higher education are determined. Are designated the prospects of introducing the effective contract and the reasons, which impede its introduction.Рассматриваются вопросы управления кадровым потенциалом высшей школы в связи с обновлением нормативных правовых актов в сфере труда, образования и науки. Определены некоторые проблемы в сфере управления кадровыми ресурсами и регулирования труда педагогических работников в системе высшего образования. Обозначены перспективы внедрения эффективного контракта и причины, препятствующие его внедрению